Effect of Mo Addition on the Grain Growth of IN718 Alloy

Han, Da; Liu, Fang; Jia, Dan; Qi, Feng; Yang, Hong Cai; Sun, Wei; Hu, Zhuang Qi

doi:10.4028/www.scientific.net/msf.816.594

Cited by 3 publications

(2 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, 316L ASS in this work has a high content of molybdenum, but it was not sufficient to suppress grain growth compared to 253 MA ASS during annealing. Han et al (2015) found that molybdenum at around 2 wt% in IN718 alloy could precipitate in austenite grain boundaries, which effectively prevented grain growth. Grain growth is also affected by the SFE values in both steels.…”

Section: Grain Growth Of 253 Ma and 316l Assmentioning

confidence: 99%

Effect of Prior Austenite Grain-Size on the Annealing Twin Density and Hardness in the Austenitic Stainless Steel

Anwar¹,

Melinia²,

Pradisti³

et al. 2021

IJTech

View full text Add to dashboard Cite

The present study examined the effect of prior austenite grain size on twin density and hardness of austenitic stainless steels (ASS). The 253 MA and 316L ASS were subjected to multipass cold rolling to reduce thickness up to 2.3 mm. Subsequently, the rolled steels were heat treated at 1100°C at 0, 900, 1800, 2700, and 3600 seconds in a tubular furnace in a hydrogen atmosphere. At the end of the annealing time, the rolled steel was quenched in the cooled zone of the tubular furnace until it reached room temperature in a hydrogen atmosphere. Then, microstructure observation of ASS was done to identify the austenitic grain size and annealing twin, and a hardness test was performed using the micro-Vickers hardness scale. The line intercept method was used to measure the changes in 253 MA and 316L austenitic grain sizes. ImageJ software was used to measure grain size and twin length. The results showed that austenite grains of both steels grew normally; 253 MA ASS had a lower SFE and K value than 316L ASS, which indicated that 253 MA ASS had sluggish grain growth, smaller grains, more easily formed annealing twins, and higher twin density. The Hall-Petch coefficient, K', of 253 MA ASS was higher than 316L ASS, which resulted in a higher hardness value. The Sellars, Pande and Hall-Petch models were shown to predict austenite grain sizes, twin density, and hardness in 253 MA and 316L ASS.

show abstract

Section: Grain Growth Of 253 Ma and 316l Assmentioning

confidence: 99%

Effect of Prior Austenite Grain-Size on the Annealing Twin Density and Hardness in the Austenitic Stainless Steel

Anwar¹,

Melinia²,

Pradisti³

et al. 2021

IJTech

View full text Add to dashboard Cite

show abstract

“…The UTS of liquid nitrogencooled FM1 fusion zone (1038 MPa) was higher than that of the FM2 fusion zone (1005 MPa) for the same weld cooling rate (510°C/s). This could be due to the reduced grain growth by the retention of molybdenum in the dendrite [11]. The microstructures were refined in FM1 fusion zone due to the addition of molybdenum which promoted solutal undercooling by the concentration gradient.…”

Section: Mechanical Property Characterization Of Weldmentsmentioning

confidence: 99%

Laves Phase in Alloy 718 Fusion Zone

Manikandan¹,

Sivakumar²,

Kamaraj³

2018

Superalloys for Industry Applications

View full text Add to dashboard Cite

The gas tungsten arc (GTA) welded fusion zone of alloy 718 has been well investigated on the formation of interdendritic Laves phase. This article deals with the various process control methodologies for minimizing the microsegregation and Laves phase such as the enhanced weld cooling rate in GTA welding (GTAW) process and modification in weld metal chemistry. Even though the high energy density welding processes such as electron beam (EB) and laser beam (LB) welding techniques are proven in minimizing the microsegregation and Laves phase, the requirement of conventional GTA welding process still exists in the aerospace industry due to the complex shapes of the components and the inaccessible conditions for executing the welding process. The enhancement in the weld cooling rate and modified weld metal chemistry resulted in the refined fusion zone microstructure and reduced microsegregation. Enhanced weld efficiency on ultimate tensile strength (UTS) and 0.2% YS at 25°C was observed to the tune of 85 to 93% by employing cryogenic cooling in GTA welding process. Similar improvement in weld efficiency at 650°C was observed. However, the evaluated weld efficiencies with cryogenically cooled weld metal were marginally lower than the previous works in EB and LB welds only by 2-3%.

show abstract

References

2019

Welding the Inconel 718 Superalloy

View full text Add to dashboard Cite

Effect of Mo Addition on the Grain Growth of IN718 Alloy

Cited by 3 publications

References 13 publications

Effect of Prior Austenite Grain-Size on the Annealing Twin Density and Hardness in the Austenitic Stainless Steel

Effect of Prior Austenite Grain-Size on the Annealing Twin Density and Hardness in the Austenitic Stainless Steel

Laves Phase in Alloy 718 Fusion Zone

References

Contact Info

Product

Resources

About